Hello, is it possible to make lets say a steinway piano sample "spin" like an oscillator? this with the purpose of having long glissandi with a piano like timbre in case Im unable to synthesize realistically a piano like tone...
Thank you!

When you say "spin like an oscillator," do you mean you want the waveform of the piano sample to loop between transients to create an elongated note? This is certainly possible. I think what you are talking about is something like a wavetable synth. This could also be achieved using a sampler, setting the loop region of the waveform which you would want to 'oscillate.' The difficulty in achieving good sounding results is in finding a good point on the waveform that doesn't click, pop or drastically change volume between loops. This can often be remedied using crossfading, however, a realistic sound is unlikely to happen in this way, as looped samples which cycle only a few cycles of the waveform almost invariably come out sounding fake. To achieve truly realistic results, you will want to loop the largest possible portion of the waveform and probably use multisampling for varied velocity. Let me know if my answer is way off from your original meaning.

@th8a yes, when i say spin is to loop between the top of the waveform to the bottom and Then accelerate to create a glissando, this type of oscillator is to be controlled by a curve, just like i do to a normal sinewave oscillator!
Ill test with a sampler thanks.

@H.H.-Alejandro Probably a granular sampler would work better at sustaining a specific portion of a sample without making the loop sound obvious.

Another thought is to use the paulstretch effect in Audacity with a high time resolution, and blend the result with the attack of the original sample to create a very long decay which would be easier to loop than the original sample.

@weightless ok ill do that

If im not happy with the way the score im working on will sound, ill def. try your options, thank you both.

I'm not sure what kind of sound you are going for exactly, but if you plan to oscillate only one cycle of the waveform, you can expect it to come out sounding like an old buffered op-amp synth from the 80's. A cool sound, yes, but not entirely 'organic. use a larger portion or 'granule' if you will, to get it more natural sounding. Experiment with crossfading and looping the granule forwards and backwards in an alternating loop... sometimes that can help compensate for volume dips in elongating percussive instruments like a piano. Hope that helps

@th8a Thank you!